U.S. Secretary of Homeland Security Jeh Johnson arrives to testify on "the Impact of Presidential Amnesty on Border Security" in front of the House Committee on Homeland Security on Capitol Hill, Washington, D.C., Tuesday, December 2, 2014. (Andrew Harnik/The Washington Times)

U.S. Secretary of Homeland Security Jeh Johnson testifies on "the Impact of Presidential Amnesty on Border Security" in front of the House Committee on Homeland Security on Capitol Hill, Washington, D.C., Tuesday, December 2, 2014. (Andrew Harnik/The Washington Times)

U.S. Secretary of Homeland Security Jeh Johnson testifies on "the Impact of Presidential Amnesty on Border Security" in front of the House Committee on Homeland Security on Capitol Hill, Washington, D.C., Tuesday, December 2, 2014. (Andrew Harnik/The Washington Times)

U.S. Secretary of Homeland Security Jeh Johnson testifies on "the Impact of Presidential Amnesty on Border Security" in front of the House Committee on Homeland Security on Capitol Hill, Washington, D.C., Tuesday, December 2, 2014. (Andrew Harnik/The Washington Times)

U.S. Secretary of Homeland Security Jeh Johnson arrives to testify on "the Impact of Presidential Amnesty on Border Security" in front of the House Committee on Homeland Security on Capitol Hill, Washington, D.C., Tuesday, December 2, 2014. (Andrew Harnik/The Washington Times)

U.S. Secretary of Homeland Security Jeh Johnson arrives to testify on "the Impact of Presidential Amnesty on Border Security" in front of the House Committee on Homeland Security on Capitol Hill, Washington, D.C., Tuesday, December 2, 2014. (Andrew Harnik/The Washington Times)

U.S. Secretary of Homeland Security Jeh Johnson asks a cameraman to move before he testifies on "the Impact of Presidential Amnesty on Border Security" in front of the House Committee on Homeland Security on Capitol Hill, Washington, D.C., Tuesday, December 2, 2014. (Andrew Harnik/The Washington Times)

Rep. Michael T. McCaul, Texas Republican and chairman of the House Homeland Security Committee, wants an independent review to follow up on Homeland Security's investigation into the lapses that allowed White House fence jumper Omar Gonzalez to enter the White House (Associated Press).

House Homeland Security Committee Chairman Rep. Michael McCaul, R-Texas, asks a questions on Capitol Hill in Washington, Wednesday, April 9, 2014, during the committee's hearing about the Boston Marathon Bombings leading up to the year anniversary of the attack. (AP Photo/Jacquelyn Martin)

Homeland Security Secretary Jeh Johnson arrives on Capitol Hill in Washington, Tuesday, June 24, 2014, to testify before the House Homeland Security Committee hearing regarding the growing problem of unaccompanied children crossing the border into the US. Johnson told the committee he would consider "every conceivable, lawful option" to deal with a continuing flood of immigrants crossing the U.S. border illegally from Mexico into southern Texas. (AP Photo/Charles Dharapak)

Watertown, Mass. Police Chief Edward Deveau, left, talks with Watertown Police Sgt. Jeffrey Pugliese, on Capitol Hill in Washington, Wednesday, April 9, 2014, before they testified at the House Homeland Security Committee hearing about the Boston Marathon Bombings leading up to the year anniversary of the attack. (AP Photo/Jacquelyn Martin)

House Homeland Security Committee Chairman Rep. Michael McCaul, R-Texas, left, holds a document about the Boston Marathon Bombing by Harvard Professor Herman “Dutch” Leonard, right, on Capitol Hill in Washington, Wednesday, April 9, 2014, prior to the start of the committee's hearing on the bombings leading up to the year anniversary of the attack. (AP Photo/Jacquelyn Martin)

Boston Police Department commissioner and current fellow at Harvard University Edward Davis, testifies on Capitol Hill in Washington, Wednesday, April 9, 2014, before the House Homeland Security Committee hearing on the Boston Marathon Bombings leading up to the year anniversary of the attack. (AP Photo/Jacquelyn Martin)